Glass-grinding machine



E. A. RYON.

GLASS GRINDING MACHINE.

APPLICATION HLED JUNE 19' 1919.

Piatented Apr. 5, 1921..

4 SHEETS-SHEET liii/ 414 m E. RYON. v GLASS'GRINDING MACHINE.

APPLICATION FILED JUNE 19. 1919.

Patented Apr. 5,1921.

4 SHEETS-SHEET Z.

E. A. RYON.

GLASS GRINDING MACHINE.

APPLICATION FILED IUNE I91 I919.

, Patented Apr. 5, 1921.

4 SHEETS-SHEET 3- E. A. RYON.

GLASS GRINDING MACHINE.

APPLICATION man mums, 1919.

Patgnted Apr. 5, 1921.

4 SHEETS-SHEET 5.

. special reference to PATENT crease. I

EDWARD A. RYON,

OF WELLSBORO, IENNSYLVANIA, ASSIGNOR TO FRED W. SIEMENS,

OF WELLSBORO, PENNSYLVANIA.

GLASS-GRINDING MACHINE.

Specification of Letters Patent.

Patented Apr. 5-, 1921.

Application filed June 19, 1919; Serial No. 305,362.

T 0 all who'm't't wmy' concern: I

Be it known that I, EDWARD A.'RYON, a citizen of the United States, anda resident of \Vellsboro, county of Tioga, and State of Pennsylvania,have invented certain new and useful Improvements in Glass-GrindingMachines, of which the following is a specification, reference being hadto the accompanying drawings, forming a part thereof.

My invention relates to glass grinding machines which are adapted toproduce decorated or cut glass articles and has machines of the generalcharacter shown and described in my Patents Nos. 1,251,114 and 1,251,115of December 25, 1917.

One object of my present invention is to provide a simple, durable andcompact machine of the aforesaid character that shall be adapted tooperate automatically at a relatively high speed and that shall requireonly the service of a comparatively unskilled attendant.

Another object is to provide a reliable clamping device that shall besusceptible of ready manipulation and shall hold the tumbler or otherglass article on which the work is to be done, securely in position.

Another object of my invention is to provide in a machine of theaforesaid type, simple and improved means for automatically changing theposition of the glass between the cuts of the grinding wheel,.which'shall con'iplete'more than a single design made up of a plurality ofcuts, for each rotative movement of the holder about the spindle of themachine as an axis.

Other objects and advantages of my invention will be hereinafter setforth and in order that my invention may be thoroughly understood I willnow proceed to describe the same in the following specification, andthen point out the novel features thereof in appended claims.

Referring to the drawings: Figure 1 is a front elevation of a machinearranged and constructed in accordance with my invention andconstituting an embodiment' thereof.

A partial plan v ew of the grinding wheel including stops whichdetermine the depth of each cut is shown in Fig. 2.

Figs. 3, 4, 5 and 6 are sectional elevations taken respectively on thelines 3-3, 4-4, 5-5 and 6-6 of Fig. 1.

on the bracket 29 having a hub 30 in the arm Figs. 7 and 8 are detailviews of the stop mechanism which is adapted to bring the machine torest when a tumbler or other article is completely decorated.

Fig. 9 is a detail plan view showing the operation of the release rod.

Fig. 10 is a sectional elevation, taken on the line 10-10 of Fig. 1.

Fig. 11 is a sectional detail showing the support for the ratchet lever.

A sectional elevation of the driving shaft and clutch is shown in Fig.12.

Figs. 13 and 1 1 are sectional elevations on the lines 13-19 and 14.14of Fig. 12.

Fig. 15 is a sectional elevation showing the work holder or clamp andits actuating mechanism on a larger scale.

Fi 16 is a plan view of the part shown in Fig 15, and

Figs. 17 and 18 are sectional plans taken lines 17-17 and 18-18 of Fig.15.

F mined/ridcutting wheel.

The frame of the machine comprises a base 20 to which is secured a mainbracket or head stock 21, and a wheel bracket 22 011 which a grinding orcutting wheel 23 is supported in adjustable bearing blocks 24.

Mounted on the bracket 22 are a pair of stops 25 which extend close tothe cutting edge of the wheel and have their ends squared off into asingle plane as indicated at 26, to engage the glass and limit the depthof the out which is niade in the work.

' The wear of the wheel is compensated for by adjusting the bearingblocks 24 which may be accomplished in'any suitable manner as, for,example, by adjusting screws 27 Work holder.

Rotatively mounted in the head stock or bracket 21 is 'a spindle 28which is adapted to be axially reciprocated as hereinafter explained andextends beyond the/bracket in j the direction of the cutting wheel, itsaxisv being preferably in the central plane of the wheel. The workholder, as clearly shown in Fig. 15, comprises an L-shaped which ismounted on and secured to'the extension of the spindle. A shaft 31 isrotatably supported 32 of the bracket 29 with its axis perpendicular'to.the axis of the spindle...

A plug 33 is secured to the shaft 31 and is adapted to fit into atumbler or other article to be decorated on the machine. A clamp 34which is adapted-to engage the edge of the glass is also mounted on theshaft 31. Furthermore, the glass is held in position by means of aclamping screw 35 which is coaxial with the shaft 31 and is mounted in apivotal arm 36. This arm is supported by the body of the bracket 29 andmay be swung to one side to permit the glass to be' mental jaws haveconical surfaces 44 to cooperate witha correspondingly curved surface 45of the clamping ring. The arrangement of parts is such that a tumbler'or the like may be mounted on the block 33 and extend into thecylindrical opening provided by the jaw segments. By turning theinternally threaded ring or nut 41 the jaws are forced radially inwardon account of the wedging action of the cobperating surfaces 44 and 45,and securely clamp the tumbler in position. Since the jaws aresymmetrically arranged and are concurrently actuated the glass isclamped in a coaxial position relative to the shaft 31 on which the plug33 and the block 37 are mounted.

The arm or projection 32 of the L-shaped bracket 29 has a yoke extension46 which provides spaced bearings 47 for the shaft 31, a ratchet 48 anda pawl carrier 49 being interposed between the spaced bearings. The pawlcarrier is pivotally mounted to turn about the shaft 31 as an axis and apawl 50 is pivoted thereon and is pressed against the notched edge ofthe ratchet 48 by a spring 51. A ratchet lock 52 is pivoted at 53 on thebottom of the arm 32 adjacent to the pawl carrier 49 so that a singlemember, as hereinafter explained, is adapted to release the lock andactuate the pawl. The pawl carrier and lock are respectively retractedby springs 54 and 55.

The ratchet 48 has a downwardly extending pin or lug 56 which is adaptedto actuate a trip and stop the machine when the tumbler hasturnedthrough a complete revolution about the shaft 31 as an axis.

stock or bracket 21. It has secured to it a collar 59 slotted at 60, atoothed ratchet tending projection {72 which extends through a slot 73in a yoke 74 of the bracket 21.

Driving shaft and actuating mechanism.

The actuating lever 71 is pivotally secured to an upwardly extending lug75 of the bottom of the bracket 21 by means of a pivot pin 76. It isformed to provide a pair of side rods or bars which extend on oppositesides of the spindle 28 and are connected by webs 77 and 78. A drivingshaft 79 is rotatively mounted in the head stock 21 below the spindleand substantially in parallelism therewith. It extends through theactuating lever 71 between the webs 77 and 78 as clearly shown in Fig.5, and has an annular cam 80 affixed to it in the plane of the actuatinglever. Depending from the web 77 of the actuating lever is a projection81 which extends into the cam groove of the annular cam 80 so that asthe driving shaft 79 is rotated. the actuating lever is oscillated aboutthe pin 76 as an axis. As a result a'longitudinal or axial movement isimparted to the spindle 28.

The driving shaft is provided with a clutch pulley 82 which is soarranged that it may be released to stop the machine. The clutch pulley82 comprises a driving pulley or sheave 83 having a hub 84 rotatablymounted on the outer end of the driving shaft 7 9. The pulley is held inplace by a pair of spaced collars 85 which are inned or otherwisesecured to the driving s aft, a cylindrical keyway 86 being cut partlyin the shaft and partly in the collars to form bearings for asemi-cylindrical key 87. The inner end of the keg is bent at an angle tothe axis of the sha' as shown in Fig. 12, and has a spring 88 connectedto it and tendin g to hold it in looking position in Fig. 14. The boreof the sheave hub 84 is provided with a plurality of recesses 89 whichare complementary to the key slot in the shaft and are adapted to beengaged by the semi-cylindrical key 87, provided the latter occupies theposition shown in Figs. 12 and 13, in which it is held by the spring 88.

@n the other hand, if the outwardly extending arm of the key 87 isengaged by a stop rod 90 for example, and is swung in opposition to thespring 88, the key. will move to such position as to release the pulleyfrom the shaft. The action of the stop rod 90 will be hereinafterexplained.

Afiixed to the driving shaft 7 9 is a cam block or eccentric 91, theperipheral surface of which is engaged by a link 92 universally pivotedat 93 as shown in Fig. 11. The link 92 is held against 'the cam surfaceby a spring 94 and is connected at its outer end to the pawl carrier 65.The parts and. 92 form a toggle joint and the action of the eccentric orcam 91 when the driving shaft is rotated, is such as to oscillate thepawl carrier 65 and advance the ratchet 61 step by step. It is by thismeans that the spindle 28 is rotatively advanced between cuts while theactuating lever 71 and the annular cam are relied upon to effect theforward and back motion of the spindle which advances the work towardand from the cutting wheel.

The brake band 68'prevents an overrunning or a backward movement of thespindle which might otherwise result from the action of the ratchet pawl62 which of course intermittently andsuccessively engages the ratchetteeth.

The universal pivot 93 may be constructed in any suitable manner and asshown in Fig. 11, comprises a block 95 having a cylindrical studprojection 96 which is rotatively mounted in the bracket 21 and is heldin place by a pin or set screw 97, the inner end of the set screw beingarranged to en- "age an annular groove 98 in the 'studpro-- ection. Theouter end of the block 95 is slotted to form jaws which receive one endof the link 92, the joint being completed by a pin 99.

Stop mechanism.

A bell crank lever 100'is pivotally mounted on the driving shaft 79adjacent to the inner section of the head stock. As shown in Figs. 1 and4. arm 101 of this lever extends upward adjacent tothe spindle 28 andhas a laterally extending pm 102 which is in position to engage theouter periphery of the collar 59 and enter the slot 60 when the spindleis at the outer end of its axial stroke and the bell crank lever isreleased, The other arm 103 of the lever extends downwardly in positionto be engaged by a hub 104, of a handle 105.

The handle 105 is secured tothe release rod which is slidably mounted inthe bracket 21 being looselyfitted into an opening 106 in the innerbranch of the bracket as shown in Fig. 8. The rod is provided with anotch 107 which is adapted to be engaged by a stationary finger 108,which thus serves to hold the rod at the outer extremity of is axialmovement in opposition to a spring 109 which tends to movethe rod. tothe opposite end of its travel determined by the engagement of a collar110 with the'outer section of the head stock (see Fig. 1). 1

A spring 111 presses-the rod upwardly so i i,

that it is held in the top .of the opening 106 except when it isreleased. This is effected I the rod through an' angle suifi cient toturn the slot 107 out of engagement by turning with the finger108. Thisturning maybe done manually by grasping the handle 105 if desired, or itmay be done automatically, as hereinafter explained, by the trippingaction'of the pin 56 of the ratchet 48,'upon. ection 112 which is adalateral arm or pro justably securedto the outer end of the rod 90 by aset screw 113, as shown in Fig. 8.

The hub 104 of the handle 105 is vided with a cam surface 114 in orderthat the slot 60 as soon as the slot comes into registering position.

A pair of adjustable pins or projections 115 and 116 are screw-threadedinto and extend through the section of the bracket 21 which is adjacentto the cutting wheel. They are symmetrically spaced on opposite sides soi of-the axisof the spindle 28 and extend into the path of movement ofthe ratchet lock 52 and the pawl carrier 49, the arrangement of partsbeing such that with each complete revolution of the spindle the-ratchetlock 52 is released and the pawl carrier actuated to advance the.ratchet twice.

Operation.

The operation of the machine is as follows, assuming that thepartsoccupy the positions in whlch they are shown in Fig. 1,

if power is applied to the driving pulley 83 the driving shaft will beturned together with the annular cam 80 and the cam or ec- 'centric 91.The cam or eccentric 91 actuates the links 92 and 65 so as to advancethe spindle'28 to a predetermined position in.

which it is securely held by the actuating brake-band 68 as alreadyexplained. The annular cam now begins to act with the result that thelever 71 is oscillated and passes the spindle 28 toward the cuttingwheel.

The cutting wheel is of course driven at a high rate of speed and theglass tumbler which is designated 120 is brought into contact with thecutting edge of the wheel so that a single cut is produced, its depthbeing positively fixed by the stops 2. 5.

As the rotation-of the driving shaft continues the spindle isretractedand at the same time the cam or eccentric 91 comes into position toagain actuate the ratchet and r0- tatively advance the spindle.

Two cuts are thus produced at an angle to each other and the spindle hasadvanced substantially 180 degrees. The ratchet lock 52 is now releasedby the engagement of these parts with the adjustable pin projection 115and immediately thereafter the ratchet is advanced by the movement ofthe pawl carrier 49 in opposition to the spring 54. The ratchet 48 isthus advanced one or more notches, the shaft 31 being correspondinglyturned and the tumbler being rotated through a relatively small arc to anew position in which a second series of cuts is to be produced.

By the repeated action of the annular cam and the spindle ratchet,another set of cuts is produced. The glass and the work holder have nowturned through substantially a complete revolution and the ratchet lockand thepawl carrier are actuated by coming into contact with the otherstationary pin,

projection 116.

This action is repeateduntil the tumbler or work has been turned to acompleterevolution which is determined by the pin, projection 56 of theratchet 48.

the completion of the revolution of the shaft 31, moves in a path whichis intercepted by the adjustable arm 112 of the stop rod and as soon asthe spindle is turned'the stop pin- 56 actuates the arm 112, turns therod 90 so that it is released from the stationary fin-' ger 108 and is'thrown backwardly by the spring 109.

The hub 104 is now out of engagement with the arm 103 of the bell cranklever 100 which is thusreleased and the lateral pin 102 is forced intoengagement with the collar 59 in a position to engage theslot 60thereof, as soon as the slot moves into register with the pin. Theengagement of the'pin with the slot 60 positively locks the spindle andprevents its continued rotation. Fur.- thermore, the stop rod 90 whenreleased, moves outwardly until its outer extremity is in the path ofmovement of the outwardly extending branch of the key 87 As soon as thekey engages the stop rod it 1s turned in opposition to the spring 88 andreleases and replaced by a new blank.

To start the machine: the rod 90 is moved b means of the handle 105 soas to be reset.

- his action releases the clutch key which is This pin in apredetermlned posltion corresponding to immediately set by the spring 88and since the hub 104 of the release handle has a cam pends upon theshape of the cams, the annular cam 80, for example, being arrangeddouble so that the spindle is advanced and retracted twice in each halfrevolution.

The design may be altered however, and more cuts made if desired, bymodifying the cam and changing the ratchet 61.

Various structural modifications may be effected within the spirit andscope of my invention, and I intend that only such limitations beimposed as are indicated in the appended claims.

What I claim is:

1. A glass grinding machine comprising a grinding wheel, a drivin shaft,a pulley thereon, a clutch for coupling the pulley to the shaft, aspindle, a ratchet and pawl connection between the shaft and the spindlefor rotatively advancing the spindle step by,

step, an annular cam on the driving shaft, and a rocking lever actuatedby the annular cam to move the spindle toward and from the cuttingwheel.

2. A glass grinding machine comprising a grinding wheel, a drivingshaft, a pulley thereon, a clutch for coupling the pulley to the shaft,a spindle, a ratchet and pawl connection between the shaft and thespindle for rotatively advancing the spindle step by step, an annularcam on the driving shaft, a rocking lever actuated by the annular camto'move the spindle toward and from the cutting wheel, a work holderafiixed to the spindle near one end, and means dependent upon the comletion of a predetermined movement of t e work on the work holder tomove the spindle toward and from the.

cutting wheel, a work holder comprising ashaft at an angle to thespindle, means de--.

pendent upon the rotation of the work holderabout the spindle axis foradvancing the work on said shaft step by step, and means dependent uponthe completion of a predetermined rotative movement of the work holdershaft for releasing the clutch bracket secured to the spindle near oneend,-

a shaft rotatively mounted in the bracket and extending at ri ht angles.to the axis of the spindle, a ratchet secured to the work holder shaft,a pawl carrier rotatable on said shaft, a pawl on the pawl carriercooperating with the ratchet and a plurality of relatively stationaryprojections in the path of the pawl carrier adapted to actuate the pawland ratchet and rotate the work holder shaft step bystep as the spindleis rotated.

5. A glass grinding machine comprising a rotatable work holder having awork holder shaft at right angles to its axis of rotation, a slidablestop rod, a spring tending to hold the rod in one position, a latchadapted to hold the rod in another position inopposition to the spring,and means dependent upon the rotative adjustment of the work holdershaft for releasing the rod.

6.A glass rinding machine comprising a driving sha a clutch pulley, aclutch releasing key, a spring tending to set the clutch, a stop wrodadapted to' actuate the clutch key in opposition to the spring in oneposition, means tending to throw the stop rod into said position, alatch for holding the rod in opposition to said means, and meansdependent upon the position of the work for releasing the rod.

7. A glass grinding machine comprising a a driving shaft, a clutchpulley, aclutch releasing key, a, spring tending to set the clutch, astop rod adapted to actuate the clutch key in opposition to the springin one position, means tending tothrow-the stop rod into said position,a latch for holding the rod in opposition to said means, and meansdependent upon the work for rotating the rod, the stop rod being adaptedto be released from the latch when rotated.

8. A glass grinding machine comprising a supporting bracket, a spindlerotatably and slidably supported thereby, band for preventing a freerotative movement of the spindle, a ratchet and pawl. for

rotatively actuating the spindle step by step, means for moving thespindle longitudinally forward and back, a work holder secured to the sindle, and means for positively looking t e s indle when released.

9. ,A g ass grinding machine comprising a supporting bracket, a spindlerotatably a brake and slidably supported thereby, a brake band forpreventing a free rotative movement of the spindle, a ratchet and pawlfor rotatively actuating the spindle step by step, means for moving thespindle longitudinally forward and back, a work holder secured to thespindle, a locking lever for preventing rotation of the spindle, and astop mechanism adapted to release the locking lever.

10. A glass grinding machine comprising a supporting bracket, a spindlerotatably and slidably supported thereby, a brake band for preventing afree rotative movement of the spindle, a ratchet and pawl for rotatively actuating the spindle step by step, means for moving the spindlelongitudinally forward and back, a work holder secured to the spindle, alocking lever for preventing rotation of the. spindle, a driving clutch,a, stop mechanism adapted to release the clutch, and a locking lever forthe spindle adapted to be released when the stop mechanism is actuated.11. A glass grinding machine comprising a spindle adapted to berotatively and axially moved, a work holder attached to the spindle, alocking lever for positively preventing rotation of the spindle, adriving clutch, a stop rodadapted to release the clutch in one position,and to retract the locking lever in its opposite position.

12. A glass grinding machine comprising a spindle adapted to berotatively and axially moved, a Work holder attached to the spindle, alocking lever for positively pre- .100 venting rotation of the spindle.a driving clutch, a stop rod adapted to release the clutch in oneposition and to retract the locking lever in its opposite position, andmeans dependent upon the work holder for 105 releasing the stop.

13. A glass grinding machine comprising a spindle adapted to' berotatively and axially moved, a work holder attached to the spindle, alocking lever for positively pre- 110 venting rotation of the spindle, adriving clutch having a laterally extending release key, a springtending to set the clutch, a stop rod adapted to engage the key andrelease the clutch in one position, a spring 115 tending to hold the rodin said position, a latch adapted to hold the rod in a retractedposition, a cam on the rod adapted to'release the locking lever in theretracted position of the stop rod, and means dependent 120 upon thework holder for releasing the stop rod.

the stop rod, a, laterally extending arm on.

the stop rod, and an actuating pin on the Work holder adapted to engagethe arm and release the stop rod when the work occupies a predeterminedposition on the holder.

15. A glass grinding machine comprlsing a grinding wheel, and a fixedrigid and nonyielding stop extending close to the cutting edge of thewheel and adapted to determine the de th of the cut.

-' 16. glass grinding machine comprising a cutting wheel, a support onwhich the wheel is mounted, a pair of rigid non-yielding stop -memberssecured to the support and extending close to the cutting edge of theWheel.

17. A glass grinding machine comprising a cutting wheel, a support onwhich the wheel is mounted, a pair of rigid non-yielding stop memberssecured to the support and extendlng close to the cuttingedge of theished in a single plane to determine the depth of the cut. f

In. witness whereof, I have hereunto set my hand this thirteenth day ofJune, 1919.

' EDWARD A. RYON.

,wheel and having their outer surfaces fin-

